140 BULLETIN 180, UlSnTED STATES NATIONAL MUSEUM 



dorsal and anal with middle rays prolonged to form an acutely 

 angulate fin; scales about 23 to 29; pelvics pale; light ground 

 color in lower half of body, upper half darker ; along midaxis a 

 darkish wide bond above, which is a lighter band, sometimes inter- 

 rupted in middle of body by a dark cross patch; about 18 to 20 

 transverse black lines, following transverse scale rows, meet near 

 axis of body to form a wide angle pointing forward ; front of head 

 brownish ; upper lip brown ; lower jaw and lower lip pale colored ; 

 a wide black band, nearly as wide as eye, and bordered with white, 

 passes from origin of spiny dorsal through eye to meet its fellow on 

 the isthmus; pectoral pale; caudal fin with white margin, then a 

 submarginal black line, then a white band ; basal five-sixths of fin 

 black except in one specimen 42 mm. in total length, which has the 

 basal half white ; margin of anal with white line, then a black 

 line, rest of fin pale except on a 70 mm. and a 42 mm. specimen, 

 both of which have a large black patch in dorsal posterior corner; 

 margin of soft dorsal with a white line, then a submarginal black 

 line, then a white band except on last few rays where it is inter- 

 rupted by a black patch, rest of fin pale brownish; in a specimen 

 70 mm. In total length and one 42 mm. a large black patch with a 

 white border anteriorly occupies the whole posterior half of soft 



dorsal Megaprotodon strigangulus (Gmelin) 



7&. Anal rays III, by exception IV; dorsal spines XII to XIV; soft dorsal 

 and anal with middle rays not especially prolonged, posterior 

 margin of fin more or less evenly rounded. 

 8a. Pelvic fins black, 

 9a. Dorsal rays usually XII, 26; anal III, 20 or 21; scales about 44; 

 a wide black band, bordered by yellow, passing from nape and 

 ' interorbital through eye, band narrower than eye at eye, 



widening below eye again, to isthmus, thence backward, includ- 

 ing pelvic fins; a pale band, yellow in life, crosses body from 

 front of spiny dorsal just behind eye to base of pectoral but 

 ends above base of pelvics; posteriorly body is blackish with 

 ■ about 20 nearly horizontal rows of yellow spots that occupy 



center of scales, number of rows increases posteriorly ; dorsal 

 rows end as they meet lateral line ; between lateral line and 

 r base of soft dorsal are four rows of yellow spots parallel to 



that part of lateral line; caudal peduncle black, breast black 

 and midventral side of body to anal fin ; lower jaw black, with 

 white spot on lower part of chin ; upper lips yellow ; snout 

 black ; pectoral fin pale ; margin of caudal fin white, then a 

 submarginal black band ; proximal to latter a white band, then 

 a black band; anal fin mostly black, the very edge white pos- 

 '. ■ teriorly, then a submarginal black band and a diffuse pale 



. : band, basal four-fifths of anal black; margin of soft dorsal 



with a line, then a black line, followed by a submarginal white 

 band; basal four-fifths of fin blackish with little yellowish spots 

 on each scale; spinous dorsal whitish. 



Chaetodon reticulatus Cuvier 

 9&. Dorsal rays XIII, 21 to 23 ; anal III, IS to 20 ; scales about 30 

 to 33, pectoral rays about 14 ; a black band starts on nape and 

 passes through eye to breast then to pelvics; pelvics black 

 but spines pale; about 15 longitudinal rows of spots, brownish 

 in color, rather diffuse anteriorly, distinct posteriorly; two 



